argc QApplication

[Chocobozzz]

QApplication takes the argc adress &argc whereas you send the argc value to QApplication.

[itay-grudev]

&argc means alias of the argument provided. Therefore the way I wrote it is correct. Am I not right?

[Chocobozzz]

I don't think so because I had segfault with the way you wrote, and after having added the & all is ok :p

From the doc "The data referred to by argc and argv must stay valid for the entire lifetime of the QApplication object". IMHO, the actual argc is send as a copy and so it is deleted when the constructor ends so argc is not valid for the entire lifetime of the application. It's the reason why we have to send the reference of argc, and not just a copy.

[itay-grudev]

So you propose that this:

SingleApplication::SingleApplication(int, char *[]);

Is changed to this:

SingleApplication::SingleApplication(int&, char *[]);

[Chocobozzz]

Yes it is (as in QtSingleApplication).

[Chocobozzz]

Thanks to you to propose an elegant alternative to QtSingleApplication for Qt5 :)

[itay-grudev]

And Thank You for the fix!